JPH1119132A - Main body frame for wheelchair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lighten the weight of a main body frame for wheelchair by constituting the main body frame using aluminum pipes. SOLUTION: On a substrate 14, an aluminum main pipe 15 and a sitting part pipe 16 are attached while being directed forwards and on this substrate 14, an aluminum back pipe 17 is attached while being direction upwards so that left and right frames can be provided. The substrates 14 of the left and right frames 10 are connected by a 1st aluminum connecting pipe 11, the main pipes 15 of the left and right frames 10 are connected by a 2nd aluminum connecting pipe 12, the back pipes 17 of the left and right frames 10 are connected by a 3rd aluminum connecting pipe 13 and wheels are attached to these left and right substrates 14 so that the lightweight main body frame for wheelchair can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a body frame of a wheelchair.

[0002]

2. Description of the Related Art As a wheelchair, wheels,
In general, a seat portion having a seat portion and a back portion is attached, and a person sitting on the seat portion runs by rotating wheels by hand, or another person pushes and runs.

[0003]

As described above, a wheelchair is one in which a seated person runs by rotating the wheels or another person pushes the wheelchair. The wheelchair is loaded manually on a vehicle such as an automobile. Preferably, the wheelchair is lightweight because it may travel long distances.

To reduce the weight of a wheelchair, it is conceivable to construct the main body frame using a lightweight aluminum pipe. However, it is difficult to attach wheels to the main body frame composed of aluminum pipes, and The mounting strength is weakened.

In order to connect aluminum pipes to each other, welding or the like can be considered. However, welding aluminum pipes requires a special welding technique, which is very expensive.

Accordingly, an object of the present invention is to provide a wheelchair body frame capable of solving the above-mentioned problems.

[0007]

According to a first aspect of the present invention, there is provided a board 14 on which the wheels 2 are mounted, an aluminum main pipe 15 mounted substantially horizontally forward on the board 14, The left and right frames 10 and 10 are made of an aluminum seat pipe 16 mounted substantially horizontally toward the rear and a back pipe 17 mounted substantially vertically upward on the substrate 14.
The left and right substrates 14 and 14 are connected by a first connecting pipe 11 made of aluminum, and the left and right main pipes 15 and 15 are connected by a second connecting pipe 12 made of aluminum. 17 is the third connecting pipe 13 made of aluminum
The left and right frames 10, 10 are connected to each other to form a main body frame 1, which is a main body frame of a wheelchair.

According to a second aspect, in the first aspect, a discontinuous circular hole portion 29 is formed in the substrate 14 and the circular hole portion 2 is formed.
9, a discontinuous circular hole 29 is tightened with a bolt 31 to clamp and connect the main pipe 15 to form a recess 25 in the substrate 14, and a first connecting pipe is formed in the recess 25. 11, the holding piece 27 attached to the substrate 14 with the bolt 26 is pressed against the first connecting pipe 11 to be connected, and a connecting tool 57 is attached to the left and right main pipes 15, 15 in a clamp manner. This is a main body frame of a wheelchair in which the main pipe 15 and the second connection pipe 12 are connected by fitting the second connection pipe 12 to 57 and fixing them with bolts 61.

According to a third aspect, the substrate 1 according to the first aspect is provided.
4 is connected to the seat pipe 16 so as to be able to swing up and down by bolts 36 which face substantially horizontally.
This is the main body frame of the wheelchair to which the supporting device 70 is attached.

A fourth invention is a body frame of a wheelchair in which the length of the support device 70 according to the third invention is adjustable.

According to a fifth aspect, in the first aspect, the first connecting pipe 11, the second connecting pipe 12, the third connecting pipe 1
3 is a main body frame of a wheelchair having a length adjustable.

[0012]

According to the first aspect of the present invention, since the main body frame is formed by using the aluminum pipes, the main body frame becomes lighter, and the wheelchair can be made lighter.

Also, since the wheels 2 are mounted on the substrate 14,
The wheels 2 can be easily and firmly mounted.

A main pipe 15, a seat pipe 16, and a back pipe 17 are mounted on a substrate 14 on which the wheels 2 are mounted to form a frame 10.
4 is connected by the first connection pipe 11, the weight of a person who loads the main body frame acts intensively on the substrate 14. Thus, the weight of the person can be reliably supported by the wheels 2.

According to the second invention, the main pipe 15 and the substrate 14, and the substrate 14 and the first connection pipe 11 can be firmly connected, and because they are bolted, expensive aluminum welding is not required and they can be manufactured at low cost. it can.

According to the third aspect of the present invention, the seat pipe 16 can be firmly connected to the substrate 14 by the bolt 36, and the downwardly oscillating force acting on the seat pipe 16 is mainly transmitted through the support device 70. Since it can be supported by the pipe 15, the seat pipe 16
Can be firmly supported without expensive aluminum welding and can be manufactured at low cost.

According to the fourth aspect of the present invention, the seat frame 16 swings up and down with respect to the substrate 14 by changing the length of the support device 70, so that the seat frame is provided between the left and right seat frames 16, 16. The angle of the seat to which the seat is attached to the horizontal can be adjusted.

According to the fifth aspect, the distance between the left and right frames 10, 10 is changed by changing the length of the first, second, and third connecting pipes 11, 12, 13, so that the width of the wheelchair can be reduced. It can be adjusted according to the physique.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a pair of left and right wheels 2, a pair of left and right front auxiliary wheels 3, a pair of left and right rear auxiliary wheels 4, a pair of left and right footrests 5, A pair of left and right brake devices 6 and a pair of left and right armrests 7 are mounted. A seat portion seat 8 and a back portion seat 9 are attached to the main body frame 1.

As shown in FIGS. 2, 3 and 4, the main body frame 1 is composed of a pair of left and right frames 10, 10 which are made of a first connecting pipe 11 made of aluminum and a second connecting pipe 1 made of aluminum.
2. The connection is made by a third connection pipe 13 made of aluminum.

In the frame 10, an aluminum main pipe 15 and an aluminum seat pipe 16 are mounted on a high-strength aluminum substrate 14 facing forward, and an aluminum back pipe 17 is mounted on the substrate 14 facing upward. Installed. The substrate 14
Is formed by a wheel mounting member 18, a main pipe mounting member 19, a first pipe mounting member 20, and a second pipe mounting member 21. Note that the substrate 14 may be formed as an integrated product by die casting.

The wheel mounting member 18 is in the form of a vertical plate, and a plurality of wheel mounting portions, for example, wheel mounting holes 22 are formed at intervals in the vertical direction. A plurality of grooves are formed at intervals, and guide grooves 24 are formed on the inner surface closer to the upper part in the front-rear direction.

A substantially semicircular concave portion 25 is formed at the rear end of the wheel mounting member 18. The first connecting pipe 11 is fitted into the concave portion 25, and a semicircular pressing member 27 attached with a bolt 26 is formed. The recess 28 is pressed against the first connecting pipe 11 to connect the first connecting pipe 11 to the wheel mounting member 18.

The main pipe mounting member 19 has a discontinuous circular hole 29 and is fixed to the lower part of the wheel mounting member 18 with bolts 30. The main pipe 15 is inserted into the circular hole 29, and the circular hole 29 is tightened by the bolt 31 to hold and connect the main pipe 15.

The first pipe mounting member 20 has a guide piece 32 fitted in the guide groove 24 of the wheel mounting member 18 and is connected to the wheel mounting member 18 by a bolt 33 inserted through the bolt insertion hole 23. Also, by loosening the bolt 33, it slides back and forth along the wheel mounting member 18,
Can be adjusted through the different bolt insertion holes 23 to adjust the connection position of the first pipe mounting member 20 back and forth.

Because of this, the left and right wheel mounting members 18 are directly connected by the first connecting pipe 11, so that
Strength is preferred.

Since the mounting height of the wheels 2 can be adjusted, the height of the seat 8 can be adjusted according to the height of the wheelchair user.

Further, since the mounting position of the wheel 2 in the front-rear direction can be adjusted, the distance between the center of the wheel 2 and the seat 8 in the front-rear direction can be adjusted.

The second pipe mounting member 21 is fixed to the first pipe mounting member 20 with bolts 34. The second pipe mounting member 21 and the first pipe mounting member 20 form a bifurcated seat pipe mounting portion. 35 are formed. The bolt 3 whose seat pipe 16 is oriented in the horizontal direction is attached to the seat pipe mounting portion 35.
6 is connected so as to be able to swing up and down. Specifically, a pair of through holes 16a are formed in the seat pipe 16 so as to face each other in the radial direction,
A circular guide piece 36a is provided in the through hole 16a, and a bolt 36 is inserted through the second pipe mounting member 21, one guide piece 36a, a pair of through holes 16a, the other guide piece 36a, and the first pipe mounting member 20. Then, the nut 36b is screwed and connected.

Thus, the seat pipe 16 swings up and down smoothly using the pair of guide pieces 36a as guides.

The back pipe 17 is made of aluminum, and the lower pipe 17a and the upper pipe 17b are connected by bolts 37 via joint pipes 17c. A plurality of through holes 38 are formed in the joint pipe 17c, and the length of the back pipe 17 is adjustable.

The lower pipe 17a of the back pipe 17 is attached to the second pipe mounting member 21 by a shaft 39 extending in the horizontal direction and a pair of guide pieces 39a so as to be able to swing back and forth similarly to the seat pipe 16. Upper pipe 17b of back pipe 17
As shown in FIG. 1, an armrest 7 is mounted so as to be vertically swingable.

A locking device 40 is mounted over the substrate 14 and the back pipe 17. The lock device 40 includes a fixing member 4 that is mounted upward on the first pipe mounting member 20.
1 and a bolt 42 on the lower pipe 17a of the back pipe 17.
Is provided with a movable member 43 sandwiched and attached by tightening.

As shown in FIG. 6, the fixed member 41 is provided with a lock pin 44, which is urged by a spring 45 into a pin hole 46 of the movable member 43, and is locked by a wire 47. When the pin 44 is pulled, the pin hole 4
Get out of 6.

As described above, the back pipe 17 is held in the vertical position by the lock device 40, and can swing back and forth by pulling out the lock pin 44 from the pin hole 46.

The main pipe 15 projects substantially horizontally forward from the substrate 14. The front auxiliary wheel 3 and the brake device 6 are attached to the front end of the main pipe 15 as shown in FIG.

The seat pipe 16 projects substantially horizontally forward from the substrate 14. A portion near the front end of the seat pipe 16 is curved downward, and a footrest 5 is attached to the front end as shown in FIG.

The left and right substrates 14 are connected by the first connection pipe 11 as described above. The length of the first connection pipe 11 can be adjusted by connecting the one-side pipe 50 and the other-side pipe 51 by an expansion mechanism 52.

The telescopic mechanism 52 includes a pair of cylindrical bodies 53, 53.
The left and right reverse screw portions of the screw rod 54 are screwed together and fixed so as not to rotate with a lock nut 55, and the screw rod 54 is provided with a rotating portion 56. The pair of cylindrical bodies 53 are inserted into the one-side pipe 50 and the other-side pipe 51, respectively, and are locked so as not to rotate.

As described above, when the lock nut 55 is loosened and the threaded rod 54 is rotated by the rotating part 56, the one side pipe 50 and the other side pipe 51 approach or separate from each other, and the length of the first connecting pipe 11 becomes longer. Change.

As shown in FIG. 1, rear auxiliary wheels 4 are mounted near both ends of the first connecting pipe 11, respectively.

The left and right main pipes 15 are connected by a second connecting pipe 12. Specifically, the discontinuous hole of the connecting tool 57 is inserted into the main pipe 15, and the connecting tool 57 is tightened with the bolt 58 to hold the main pipe 15.
The second connecting pipe 12 is inserted into the cylindrical portion 59 of the connecting tool 57 (that is, it is mounted in a clamp manner), and connected by fixing with the bolt 60.

The third connection pipe 13 has a substantially U-shape in plan view, and is fixed to the upper portion of the left and right back pipes 17. Note that the third connection pipe 13 may be connected to the back pipe 17 using a connection tool similar to the connection tool 57 described above.

The lengths of the second connecting pipe 12 and the third connecting pipe 13 can be adjusted similarly to the back pipe 17. For example, the first pipes 12a and 13a and the second pipe 1
2b and 13b are fitted to the joint pipes 12c and 13c so as to be extendable and contractible, and bolts 61 are inserted into any of a plurality of through holes of the joint pipes 12c and 13c to be connected. The length of the second and third connecting pipes 12 and 13 may be adjustable by using the same expansion and contraction mechanism as the first connecting pipe 11.

Since the distance between the left and right frames 10, 10 can be adjusted by changing the length of the first, second, and third connecting pipes 11, 12, 13, the width of the seat can be utilized. It is possible to match the body shape of the person.

The seat 8 is provided with the left and right seat pipes 1.
6 and 16 and the third connecting pipe 13. The back seat 9 is attached between the left and right back pipes 17,17.

The seat pipe 16 is supported by the main pipe 15 by a support device 70 so as not to swing downward. The support device 70 is, for example, a connecting tool 72 which is attached by clamping the seat pipe 16 by tightening a bolt 71.
And a connecting member 74 which is attached by holding the main pipe 15 by tightening a bolt 73.

The connecting member 74 is configured to extend and contract, such as a turnbuckle, so that the length of the supporting device 70 can be changed. Thus, the angle of the seat portion seat 8 with respect to the horizontal can be adjusted by swinging the seat portion pipe 16 up and down.

In the above description, aluminum is aluminum or an aluminum alloy.

[0050]

According to the first aspect of the present invention, since the main body frame is formed by using the aluminum pipe, the main body frame becomes lighter and the wheelchair can be made lighter.

Since the wheels 2 are mounted on the substrate 14,
The wheels 2 can be easily and firmly mounted.

A main pipe 15, a seat pipe 16, and a back pipe 17 are mounted on a substrate 14 on which the wheels 2 are mounted to form a frame 10.
4 is connected by the first connection pipe 11, the weight of a person who loads the main body frame acts intensively on the substrate 14. Thus, the weight of the person can be reliably supported by the wheels 2.

According to the second aspect of the present invention, the main pipe 15 and the substrate 14, and the substrate 14 and the first connecting pipe 11 can be firmly connected, and expensive aluminum welding is unnecessary because bolts are used, so that the cost can be reduced. Can be manufactured.

According to the third aspect of the present invention, the seat pipe 16
Can be firmly connected to the substrate 14 by bolts 36, and the downward swinging force acting on the seat pipe 16 is
The support pipe 16 can be supported by the main pipe 15 through the center pipe 0, so that the seat pipe 16 can be firmly supported without expensive aluminum welding and can be manufactured at low cost.

According to the fourth aspect, since the seat frame 16 swings up and down with respect to the substrate 14 by changing the length of the support device 70, the seat frame is located between the left and right seat frames 16, 16. The angle of the seat to which the seat is attached to the horizontal can be adjusted.

According to the fifth aspect, since the distance between the left and right frames 10, 10, 12 changes by changing the length of the first, second, and third connecting pipes 11, 12, 13, the width of the wheelchair is changed. Can be adjusted according to the physique of the person.

[Brief description of the drawings]

FIG. 1 is a front view of a wheelchair.

FIG. 2 is a front view of a main body frame.

FIG. 3 is a plan view of a main body frame.

FIG. 4 is a side view of the main body frame.

FIG. 5 is an exploded perspective view of a substrate portion.

FIG. 6 is a sectional view taken along line AA of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Body frame 2 ... Wheel 3 ... Front auxiliary wheel 4 ... Rear auxiliary wheel 5 ... Footrest 6 ... Brake device 7 ... Armrest 8 ... Seat seat 9 ... Back seat 10 ... Frame 11 ... 1st connection pipe 12 ... No. 2 connecting pipe 13 third connecting pipe 14 board 15 main pipe 16 seat pipe 17 back pipe 18 wheel mounting member 19 main pipe mounting member 20 first pipe mounting member 21 second pipe mounting member 25 concave portion 27 holding piece 29 discontinuous circular hole 40 locking device 44 lock pin 57 connecting member 70 supporting device 75 connecting rod

Claims (5)

[Claims] 1. A board 14 to which the wheels 2 are mounted, an aluminum main pipe 15 mounted substantially horizontally forward on the board 14, and an aluminum pipe mounted substantially horizontally forward on the board 14. Seat pipe 16 and the substrate 14
The left and right substrates 14 and 14 are connected by a first connecting pipe 11 made of aluminum, and the left and right substrates 14 and 14 are connected to each other by a back pipe 17 which is attached substantially vertically upward to the upper side. Are connected by a second connection pipe 12 made of aluminum, and the left and right back frames 17, 17 are connected by a third connection pipe 13 made of aluminum, and the left and right frames 10, 10 are connected to form the main body frame 1. The main body frame of the wheelchair. 2. A discontinuous circular hole portion 29 is formed in the substrate 14, a main pipe 15 is inserted into the circular hole portion 29, and the discontinuous circular hole portion 29 is tightened with a bolt 31 to form a main pipe 1.
5 are sandwiched and connected to form a recess 25 in the substrate 14, and the first recess is formed in the recess 25.
The connecting pipe 11 is fitted, the holding piece 27 attached to the substrate 14 with the bolt 26 is pressed against the first connecting pipe 11 and connected, and the connecting tool 57 is attached to the left and right main pipes 15 and 15 in a clamp manner. The second connecting pipe 1 is connected to the connecting tool 57.
2 are fitted and fixed with bolts 61, so that the main pipe 15
The wheelchair body frame according to claim 1, wherein the second connection pipe (12) and the second connection pipe (12) are connected. 3. The seat pipe 16 is connected to the base plate 14 by a bolt 36 extending substantially horizontally so as to be vertically swingable, and a supporting device 70 is attached between the seat pipe 16 and the main pipe 15. 2. The body frame of the wheelchair according to 1. 4. The wheelchair body frame according to claim 3, wherein the length of the support device is adjustable. 5. The body frame of a wheelchair according to claim 1, wherein the first connecting pipe 11, the second connecting pipe 12, and the third connecting pipe 13 are adjustable in length.